Third to gust lagerquist



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. P. PORSBERG.

VENTILATED MATTRESS.

N0.56o,613. *Patentedmaylqlaga UNITED STATES PATENT OFFICE.

PETER FORSBERG, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE- THIRD TOGUST LAGERQUIST, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 560,613, dated May (19,1896. Application filed October 28, 1895. Serial No. 567,056. (Nomodel.)

stitching ordinarily used in upholstered tops,

` To @ZZ whom, it may concern:

Be it known that I, PETER FORSBERG, of Minneapolis, county of Hennepin,State of Minnesota, have invented certain new and useful Improvements inUpholstered Spring- Mattresses, of which the following is aspecification.

This invention relates to upholstered springmattresses; and theparticular object of my invention is to provide a thoroughly-ventilatedupholstered spring-mattress and to arrange for the ventilation by meanswhich will be cheap and economical and thoroughly durable, the sametaking the place of other parts, so that the general cost of themattress is increased but slightly.

To this end my invention consists in the combination,with a suitableframe, of springs arranged thereon, the upholstered top laid upon saidsprings, means inclosing the top and frame whereby the entrance or exitof air is prevented, and said top being stitched with metallicclenching-tubes, which secure the parts of the top together and each ofwhich performs the function of a Ventilating tube or opening in theotherwise solid top.

The invention will be more readily under- V stood by reference to theaccompanying drawings, forming part of this speciiication, and in which-Figure 1 is a view of the top of a mattress embodying my invention. Fig.2 is an enlarged view of a portion of the top. Fig. 3 is an enlargedview of a portion of the mattress viewed from underneath. Fig. 4 is anenlarged vertical section of the mattress. Fig. 5 is a detail view ofone of the clenching-tubes before the lower part thereof is turned orclenched.

As shown in the drawings, the mattress comprises a frame 2, a portion ofwhich is shown in Fig. 4:, which frame has cross-slats 3, upon which thesprings 4, of which a large number are used', are secured. On the upperends of these springs rests the upholstered top made up of the uppercloth or facing 5, the undercloth 6, and the lling of hair or likematerial?. The edges of the upper and under cloths or facings arestitched together and preferably to the end and side facings 8. Thebottom of the frame is closed to the entrance or exit of air by'a clothor lining 9, which with the sides 8 is preferably of materialpracticallyimpervious to air. In place of the threadby which the top istacked at intervals, I employ metal clenching-tubes 10, (shown in detailin Fig. 5,) composed of a simple tube, the upper end of which is flaredout while the lower end is preferably separated into a .number oftongues, which after the top is inserted through the upholsterin g areclenched orbent upward, so that the tube firmly binds together thedifferent parts of' the top, taking the place of the usual stitching,and at the same time serving as a Ventilating-tube by which air mayenter into and leave the mattress. These tubes are employed throughoutthe top in place of the usual stitching and are so frequent thateffectual ventilation is afforded and the mattress is rendered cool andcomfortable. Pressure upon any part of the top of the mattress will actto force air up through all of the tubes in its surface, so that allparts are ventilated and cooled.

The mattress is particularly designed for use in hospitals and for thesick generally, but is equally adapted for general household use.

Having thus described my invention, I claim as new and desire to secureby Letters Patent l. The combination, in an upholstered spring-mattress,of a suitable frame, springs arranged thereon, imperforate sides andbottom for said mattress, an upholstered top arranged to rest upon saidsprings, and a series of metal tubes passing through said upholsteredtop and forming means for securing said top at suitable intervals, andalso forming Ventilating-openings in the top of said mattress.

2. The combination, in a mattress, with a suitable frame, of springsarranged thereon, imperforate bottom and side walls inclosing saidsprings, an upholstered top secured to the upper edges of said sidewalls and resting upon lthe tops of said springs, said top having aseries of openings communicating with the interior of the mattress, forthe purpose specified.

In testimony whereof I have hereunto set my hand this 19th day ofAugust, A. D. 1895.

PETER FORSBERG.

In presence ofn C. G. HAwLEr, F. S. LYON.

IOO

